.container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
}

.btn {
    width: 50%;
    height: 60px;
    font-size: 40px;
    margin: 10px;
}
